Could no longer calibrate my phantom 3 with the latest firmware, tried IMU reset, etc.. No luck. I also suffered from bad RC signal to the point where I lost the signal. Reverted to previous firmware all ok..

How do you do the downgrade to a previous version?

Hi, I went to the dji site, downloaded the previous version. Copied the bin file to the SD card. Loaded the card in the drone and restarted it... It reloaded the firmware in 15 mins or so..